Shapley supercluster


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Shapley supercluster

(shap -lee) The richest supercluster known, containing more than 20 rich clusters of galaxies within a 40 Mpc diameter. It was first noted by H. Shapley in 1930. It lies behind the Hydra–Centaurus supercluster, in the same direction as the Great Attractor, but three times farther away, at a distance of 180 Mpc.
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Beyond that and about four times farther away lies another, equally influential attractor called the Shapley Supercluster.